Oil and soap solution



JUDSON A.'DE GEW, F MONTREAL, QUEBEC, CANADA.

No Drawing.

To all whom it may concern:

Be it known that I, J UDSON A. Dn Cn W, a subject of the King of Great Britain, and

resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have lnvented certaln new and useful Improvements in Oil and Soap Solutions, of which the following is a full, clear, and

. exact description.

This invention relates to a composition which can be used as a sizing material for paper stock and which can also be employed in the flotation of paper and pulp fibers in recovery systems. It may also be used for the purpose of introducing coagulant into the solutions of industrial wash waters for the purpose of altering the surface tension and producing a tendency to form a permanent froth with air, and by means of this froth any suspended matter. is recovered by flotation.

The principal object of my invention is to provide a product which can be forced into the waste waters containing pulp or paper fibers, preferably with more or less agitation, which product will produce a frothing condition in the waste waters, permitting gas bubbles to rise and adhere to the fibers, floating them to the surface. My product has,'however, the further quality of acting as a yery satisfactory sizing material,

so that when the recovered fibers are carried back to the paper, beneficial sizing results will be produced.

According to my mvention, I first dis-- solve any 011 in a concentrated solution of any soap, incorporating say about one hun- 'dred pounds'of oil in approximately the same amount of soap, but this proportionmay be adjusted to meet various requirements. The next stepin the process is to dilute this soap solution in such a manner as to prevent separation of the oily material in the form of globules and this is best accomplished by an emulsifying process, such as that described in Reissue Patent No. 12,549 or in my application,

-Serial Number 195,607. It is possible to obtain a soap solution with a concentration of approximately 2% total sohds, which holds in colloidal solution or permanent emulsion the oil originally incorporated.

The soap which is used for dissolvinv the oil may be soap made from any saponifiable material. YVhen solutions such as above described are incorporated into the paper stock Specification of Letters Patent,

OIL AND soar SOLUTION.

Patented Apr. 20, 1920.

Application filed May 17, 1918. Serial No. 235,137.

sulfate or other precipitant. It is thus incorporated into the pulp ofthe paper mass and according to this treatment small quantities 'of oil in proportion to the weight of the paper may be incorporated. The paper made from this pulp has the property of being waterproof Without the disadvantage of an excess of oil. Furthermore, paper madefrom pulp recovered. in this manner still retains its strength, pliability and moisture, whereas an oil impregnated paper has less strength and is disagreeable to use.

lVhen this product is used in connection with the flotation process as described in my U. S. patent application, Serial Number 217 .691, a very small quantity of theoily product is introducedv preferably under agitation with air into. the waste waters to produce a more or less permanent frothing condition. This emulsion product has a coagulating action upon the pulp fibers which increases the tendency of the fibers to draw together in a mass, thus permitting them to be more easily separated and floated to the surface. This product not only has the desired effect in facilitating the formation of gas bubbles and making them adhere to the surface of the floating fibers, but also produces beneficial sizing results when the re: covered material is returned to the paper held in colloidal solution by means of a highly dilute soap. 7

2. A stable product for the purpose specified, consisting of a highly dilute aqueous colloidal solution of oil produced by diluting in Water without decomposition a per fect blend of soap and oil.

In Witness whereof I have hereunto set my hand.

JUDSON A. DE oEW; 

